# Jus Cogens — Peremptory Norm > Educational app for international law principles, treaties, and legal terminology. (iPhone/iPad app by Fred Harrison.) - Source: https://appshunter.io/ios/app/jus-cogens/id6760504315 (this page in markdown: same URL + `.md`) - Developer: [Fred Harrison](https://appshunter.io/developer/1884727730) - Category: Education, Lifestyle - Price: Free - Age rating: 4+ - Requires: iOS 18.6 · 9 MB - Languages: English - Released: 2026-05-21 - Data updated: 2026-08-23 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/jus-cogens/id6760504315/reviews.md ## What is Jus Cogens? Jus Cogens App User Guide Overview The Jus Cogens App provides quick access to key principles of international law, core legal norms, major treaties, and essential terminology. The application is designed for educational purposes and allows users to easily navigate between legal concepts and source materials. Home Screen The Home tab provides the introduction to the application. From this screen you will see: the title of the application the version number the main navigation bar at the bottom of the screen Use the bottom navigation bar to move to other sections of the app. Norms The Norms section presents the foundational principles of jus cogens and other recognized norms of international law. Features include: A list of norm categories Quick navigation buttons at the top of the page Scrollable explanations of each legal norm Each section explains the meaning and significance of the norm in international law. Treaties The Treaties section provides access to relevant international treaties and legal instruments. Features include: Organized treaty sections Scrollable treaty text Automatic navigation when cross-references are selected When a cross-reference is selected in another part of the app, the application will automatically move to the relevant treaty provision. Glossary The Glossary provides definitions of key legal terms used throughout the application. Features include: Search bar for locating terms quickly Expandable definitions Tags related to legal concepts Cross-reference buttons linking to treaty provisions Selecting a cross-reference will take you directly to the relevant treaty section. Cross-References Some sections include cross-reference buttons. When selected: the application will automatically switch to the appropriate treaty section the referenced article or provision will appear on screen This feature allows quick navigation between legal principles and their source documents. Educational Use This application is provided for educational and informational purposes only. It is not intended to provide legal advice. Users should consult official legal sources and qualified legal professionals for authoritative interpretations. Version Information The current version of the application is displayed on the Home screen. Updates may add additional legal materials, treaty references, and glossary entries. ## Key features - Access to core legal norms - Major treaty texts - Essential legal terminology glossary - Quick navigation between concepts - Automatic cross-referencing - Scrollable explanations ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/jus-cogens/id6760504315/reviews.md ### 5/5 — Jus Cogen *2026-06-18, version 1.8* Excellent tool and user friendly. ### 5/5 — The Rule of Law (Human Rights and Dignity) *2026-06-15, version 1.8* This is an excellent tool to reference the foundational principles of the rule of law. Very well organized and easy to navigate for quick reference. ### 5/5 — Will Only Get Better *2026-06-13, version 1.8* The navigation of Inalienable Rights and Peremptory Norms ## Frequently asked questions about Jus Cogens ### What is Jus Cogens? Jus Cogens is an educational application that provides quick access to key principles of international law, core legal norms, major treaties, and essential terminology. It is designed for educational purposes, allowing users to easily navigate between legal concepts and their source materials. ### What kind of legal principles does Jus Cogens cover? Jus Cogens covers foundational principles of jus cogens and other recognized norms of international law. It presents these norms with scrollable explanations detailing their meaning and significance in international law. ### How does Jus Cogens help with understanding treaties? The app provides access to relevant international treaties and legal instruments. Treaty texts are scrollable, and the application features automatic navigation when cross-references are selected, allowing quick access to specific treaty provisions. ### Can I look up legal terms in Jus Cogens? Yes, Jus Cogens includes a Glossary section with definitions of key legal terms. It features a search bar for quick location, expandable definitions, and tags related to legal concepts, with cross-reference buttons linking to treaty provisions. ### How does the cross-referencing feature work in Jus Cogens? Cross-reference buttons are included in various sections. When selected, the application automatically switches to the appropriate treaty section or displays the referenced article or provision, enabling swift navigation between legal principles and their source documents. ### Is Jus Cogens suitable for legal advice? No, Jus Cogens is provided for educational and informational purposes only and is not intended to provide legal advice. Users should consult official legal sources and qualified legal professionals for authoritative interpretations. ### How often is Jus Cogens updated? The latest version of Jus Cogens is 1.8, last updated on 2026-06-07. Updates may add additional legal materials, treaty references, and glossary entries, ensuring the content remains relevant. ### What devices is Jus Cogens available on? Jus Cogens is available on iPhone and iPad devices. It is designed to be accessible on these platforms for educational use. ## Version history (last 3 releases) ### 1.8 — 2026-06-07 The UDHR is now cross-links to the treaties. Blue highlights have been had for important information (Jus Cogens). ### 1.7 — 2026-06-01 I button link was missed and now it active ### 1.6 — 2026-05-22 No release notes. ## Apps similar to Jus Cogens | App | Rating | Price | Category | | --- | --- | --- | --- | | [Preschool Games for Toddler 2+](https://appshunter.io/ios/app/preschool-games-for-toddler-2-plus/id1176053552) | 4.2 (406,337) | Free | Education | | [Text To Speech – Audio Reader](https://appshunter.io/ios/app/text-to-speech-audio-reader/id1621275140) | 3.9 (145) | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*